Intensity is signed integer, fix its display.
diff --git a/main.c b/main.c
index 91c3a2b..cf9628a 100644
--- a/main.c
+++ b/main.c
@@ -3256,7 +3256,7 @@ retry:
if (gpus[gpu].dynamic)
wlog("Dynamic\n");
else
- wlog("%u\n", gpus[gpu].intensity);
+ wlog("%d\n", gpus[gpu].intensity);
for (i = 0; i < mining_threads; i++) {
thr = &thr_info[i];
if (thr->cgpu != cgpu)